Thank you @fabian, I definitely agree that JUCE should have an easier way to make a StandaloneFilterWindow, but I would think that considering that all/most of the necessary functionality is already there, it’s more an issue of having some hooks to modify it and less of a desire to start allover from scratch.
In my quest for that desired additional functionality, I hit some major roadblocks trying to go fullscreen. Please take a look at the more complete post here: Standalone issues